This is a KWA PTR (professional training rifle). It operates on green gas or propane and functions in every way exactly like a real M4. It comes with composite flip up sights and three magazines. Each magazine holds 40 rounds each.
We bought these rifles for conducting training with Naval Special Warfare and have only used them a few times since. They have milled receivers which makes them extremely strong and ideal for the full contact force on force grappling we were using them for. The stocks are 3 position collapsible. They WILL NOT come with the sling. They are capable of safe-semi-full auto.